Brake testing device



May 10, 1932. c. E. WEST BRAKE TESTING DEVICE Filed March 25, 1929 Patented May 10, 1932 West 91 we -s -a WISCONSIN 133mm resume DEVICE a n a i m e March 25, gees. semi No. eiaeaa L This invention relates to" new and llSfiiLll improvements :i brake testing devices.

.One of the jects of my invention provisicm of a brake testing device can be quickly and readily applied. to

a veh le r ea w ere th w eel can b moved aga-m'st the brake action and the re-v sistance of the brake indicated by .a registering member so as to i eaclily determine whether or not the brake band needstig htening and at the same time be noted that brake bands of a motor vehicle can all be registered for the same amount of brake a, on. v I v nfother object of my inyen tiqn is the provi ier ate nae t e s device! (if the ew Character is ihterci angeable ,that-it b'eaeiekly ande e y a ied to e the the right or left wheel of a motor vehicle and 29 quickly clamped thereto without injuring the pneumatic tire and is readilyvoperable to indicate the amount ofresistance inthe brake action. 1 a I Aiurther object of the invention isthe P s o o a b ak s i g d vi ich when applied to the wheel, is so construeted a the app i a ion a a Pressur i eq afly d st bu e 'thr ueheu eeeteur hi the wheel so that no particular point receives a 7 greater strain o n thewheel andthe resistance o h br action a be ill yanr ead y determined. r p 7 the ab ando h i lbi ts l -mew, h m' t o lrc st in the ner l iea ur s of construction,-the combinationand-arrangement of parts he reinaatterwmo re [fully set forth, pointed out in the claims and shown n h a companying awing w Figure 1 is a side elevation illustrating the application of my improved brake testing device; Figure 2 is a plan view. 7 Referring more particularly to the drawings wherein I have illustrated the application of my improved device it will be noted that the device comprises a substantially tri angular frame 1 preferably formed of angle iron and midway between each point of the frame are the sleeves 2 which receivetherethrough the threaded portion of the securing outer end to a'lever l1. "'l hisllever isalsoY hooks 3. The threaded portionsof the hooks 3 are loosely mounted in the sleeves 2 and have adjusting uts l thereon against the inner ends o fflthe sleeves for adjusting the hooks 3 to engagethein with the tir e of the wheel as shown in the drawings. From th a ll 'apr r et tha "the h zks are engaged with the pneumatiotire onlthe wheel, they canlie tightly clampd thereto hr ug t j stm nt of the uts 14.

in tightening the clamps orhdoks :t'o'the aumntic re; has a tendency todraw the are e r,tighten ugthe same against theouter sang-ace of tae V the ane'le ire formation oftne framefrom cutting or ml atingthe tire; I provide Sii b- I 4 ntially triangular bearing plates 5 at each corner ottlie frame. These plates are pro; vided substanti al flat bearing surfaces adapted wer h rne m i r 3 ri vent the angular framework from ,contact mg with the tire. These plates 5 may either besupportedby the frame ol connec-ted thereto as desired. v r A supporting memheris extended transversely across one corner ofithe framegsaid supporting" member having its intermediate part oilset as shown at'ti ndjrivete d orother- V wise secured tothe flame" -1 i:

Cihe' GltlS of the supportiii member are inml a d cated at'z' and fr'" aiid tthese ends are arranged substantial alignment as shown inv Figure 2 and support bifureated brackets ,8 and 8: The length of the suppontiug tem ber is substantiallyequal.to the widest part of the frame 1 and loosely mount ed 1115011 eitheroneoijthe bifurcated braeketsisa pression cylinder 9 having 'a piston roca'ting thereimiwhieh is ooniiectecl teas provided with an lofiset po tlQIlil a-l tg ed i fespond with the angular of the ofiset portionfi. 1 a i H j n The Lener end of r-theqlever 11 is piv qtally pt; inOlljltfifliOlljl IYQ-HLOXftifilGiDlIl lfiwhilethe er end of the lever is provided ,with hand gri p 14; Theiinn-e r end of the i$fPZiY- oted en one .ofthle. de'poitions oft'h e ira ne 1 apcint adjacent one corner ofthe frame-: 9

e in order to pr event and with the lever extending transversely across the frame, but connected to the piston 10.

In order to regulate the pressure within the cylinder 9, I provide a gauge 15 which is connected to the inner end of the cylinder and is adapted to register the downward pressure of the piston, this registration indicating the resistance of the brake drum.

It will be apparent from the illustration that thecylinder 9 canbe supported at either I 1 pressure measuring mechanism, wherecy the end of the supporting member by attaching the same either to the bracket 8 or to the bracket 8' and the lever 11 can have its position reversed by removing the pivot pin 13 from its present position and engaging it with the opposite side of the frame.

Thus, the device can be used on either side of a motor vehicle to test the brakes of the Wheels'thereof, without removing the wheels face of the wheel.

from the'vehicle, it only being necessary to use an ordinary type of jack to disengage the wheels from the surface'on which they are resting. u v

In using my improved brake testing device, the hooks or clamps 3 are adjusted to engage the pneumatic tire of a wheel and then clamped tightly thereto, said clamping action drawingthe frame 1 tightly against the-outer The wheel can either be jacked up before or after the device is clamped to the wheel so as to disengage the same from the surface upon which it is resting. I The brake band is then tightened by use of the well known emergency brake lever and the resistance of the'brake band can then be tested by" exerting a downward pressure on the lever 11, urging the wheel against the action of the brake, the downward movement of the lever simultaneously moving the the cylinder 9 and lever 11 transposedfor use on either side of the frame according to the position of the wheel to which the device is to be applied.

' I claim:

1. A brake testing, device comprising a triangular body frame, means connected to each side of said frame for clamping said frame to a vehicle wheel, a supporting member transversely of one corner of the frame, a pressure cylinder carried by the suppor ing member, a piston movable in the cylinder, a

pressure gauge having connection with the cylinder, and a'lever having one end pivotally connected with the frame adjacent a sec- 0nd corner and operatively connected with action of its brake will be-registered by the.

gauge, I

2. A brake testing device comprising a triangular body frame, means connected to each side of said frame for clamping said frame to' a vehicle wheel, a supporting member transversely of one corner of the frame and connected thereto, a pressure measuring mechanism carried by the supporting member, and a lever having one'end pivotally connected with the frame adjacent a second corner and operatively connected with the of one corner of the frame andsecured thereto, pressure measuring means adapted to be removably connected to either end of the supporting member, and a lever having one end adapted to be pivotally connected to the body frame adjacent either of the corners opposite the supporting member andhaving I operative connection with the 'pressure measuring means. whereby the pressure applied to the lever for rotating the wheel against the action of its brake will be registered by the gauge. Y

4. A device of the class described including a'triangular body frame, means connected to each side of the frame for clamping the frame to a vehicle wheel, an elongated supporting membercarried by the frame and extend ng transversely of one corner thereof,

pressure measuring means adapted to be revmovably connected toeitherend of the sup porting member, and a lever having one end adapted to be pivotally connected to either side of the body frame ad acent a second' corner and having operative connection with thepressure measuring means, whereby th pressure applied to the lever-for rotating; the

wheel against the action of its brake will be registered by the pressure measuring means;

In testimony that I claim the foregoingl have hereunto'set-my hand at VVatertown,-in the county of Jefferson and State of Wis- COIlSlIl.

CARL E. TEST. 

